Combined type-writing and computing machine.



F. A. HART. K COMBINED TYPE WRITING AND COMPUTING MACHINE.

AAPPLICATION FILED MAY Io. 1916. 1,1 90,171 Patented July 4, 1916.

` 14 SHEETS-SHEET. l.

' BY Q Q v C l ATToRY.

y F. A. HART. COMBINED TYPE WRITING AND COMPUTING MACHINE..

APPLICATION FILED MAY I0, 19.16. f

Patented July 4, 1916.

' 14 SHEETS-SHEET 2.

WITN ES5E51- mi@ BY ATTORNFY F. A. HART.

coMxNED TYPE wRlTlNG AND COMPUTING MACH|NE.

APPLICATION FILED MYAY I0. 1916.

Patented July 4, 1916.

1.4 SHE ETS-SHEET 31 11n/mrow MOL-WNW ATTOR Y.

F. A. HART;

COMBINED TYPE WRITING AND COMPUTING MACHINE.

Patented July 4, 1916.

1.4 SHEETS-SHEET 4.

APPLICATION FILED M AY 101.1915.

, i INVENTOR= M f- 1M AUoRNiY.

F. A. HART.

COMBINED TYPE W 6' Patented July 4, 1916.

1.4 SHEETS-SHEET 5.

INVENTOR= M 4X 9 J. X. 15M 6 .w51 f Iz za 60 pf M a I X1 ATTOR Y.

HINE.

Patented July 4,1916.

1.4 SHEETS-SHEET 6.

F'. A. HART.

APPLIAQATIQN FILED NIM/10` 191s.

|NVENTOR= MM BY //M?" I v ATO NES/Q "LIMIT-.

COMBINED TYPE'WRITING AND COMPUTING MAC WITNESSES? MGM F. A.' HART.COMBINED TYPE WRITING-AND COMPUTING MACHINE.

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WITN ESSESg ATTO" EY;-

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F. A. HART.

COMBINEI) TYPE WRITING AND COMPUTING MACHINE.

. APPLICATION. FILDA MAY 1.0, 191.6. b 1,1 90, 1 'Il Patented July 4,1916. L4 SHEETS-SHEET 8- INVENTOR i' Patented July 4, 1916.

14 SHEETS-SHEET 9,

|N.\/ENTOR= WMM F. AI'HA'RT.

APPLICATION FILED MAY I0, 19.16.

COMBINED TYPE WRITING AND CONIIUTING MACHINE.

WITNESSES F. A. HART.

COMBINED TYPE WRITING AND COMPUTING MACHINE. APPLICATION manMAI/10.1915.

Patented July LI., 1916.

1.4` SHEETS-SHEET I0.

l l5 wITN ESSE ,It

LA Mme INVENTOR AT VTo EY.

F. A. HART. COMBINED TY-PE WRITING AND COMPUTING MACHINE.

F. A. HART. 4 COMBINED IYPEwRmNG AND COMPUTINGMACHLNE.

APPLICATION FILED MAY 1.0, 191.6. n 1,190,171. Patented July 4,1916.

144 SHEETS-SHEET 12.

WITNESSES n BY y l Y 'ATTO EY.

INVENTORv L Si F. A, HARTL COMBINED'TYPE WRITING AND COMPUTING MACHINE.

APPLICATIONFI-LED MAY I0, i916.

Patented July 4, 1916.

I4 SHEETS-SHEET I3.

n- Ig INVE-NTOR' WIWI- 5555? @if A i MQW I I BY Md Wm Q n I ATTOR EY.

F. A. HART.

COMBINED TYPE WRITING AND COMPUTING MACHINE.

WIT NESSES1 nUNITED srnfrns ramener FREDERICK A. HART, F NEWARK, NEWJERSEY, ASSIGNOR, BY MESNE ASSIGNMENTS, TO UNDERWOOD COMPUTING MACHINECOMPANY, OF NEW YORK, N. Y., A CORPO-l RATION OF NEW YORK.

COMBINED TYPEJNRITING AND COMEUTING MACHINE.

Original application led December 10, 1908, Serial N. 466,836.

16, 1916. Serial No. 96,527.

To all whom t may concern.'

Be it known that I, FREDERICK A. HART, a citizen of the United Sta'tes,residing in Newark, in the county of Essex and State of New Jersey, haveinvented certain new and useful Improvements in Combined 'l`ype-7ritingand Computing Machines, of

which the following is a specification.

My invention, which relates to computing machines and to combinedtypewriting and computing machines, has for its princi pal objecttoimprove the construction and operation of machines of this generalcharacter; and the invention consists in the novel devices andcombinations lof devices hereinafter described and set forth in theclaims. This application is a division of my application No. 466,836,filed December 10, 1908. Certain of the features disclosed in saidapplication 466,836 are shown in my divisional Patent No. 1,17 6,364,granted March 21, 1916. y

In machines of this class,l the numeral printing keys` of thetypewriter, as they are operated, set up individual indexing pins ordevices, one for each printed digit; and the digits thus set up andprinted or written are later carried into the computing or dial wheels,which go to vmake up a register. Cn the typewriter there is usuallyemployed one single print-ing key for each of the nine digits; and inthis class of machines there is provided a separate digit bar or'computation bar for each of the computing wheels, whereby the same maybe driven. The typewriter carriage selects the denomination, that is,determines in which denomination an index pin or device shall be set atthe A operation of a printing key, so that when a certain digit isprinted,say, in the thousands place on the work-sheet, an indexing pinof corresponding value is at the same time set in the thousands place inthe computing mechanism. These individually settable indexing devicesmay be termed preliminary representation devices, since the numberthatis eventually to be run into the dial wheels of the register isrepresented preliminarily by the setting of these index pins. Each ofthe digit bars or computation ybars has a set, of usually nine, of theseindex pins. After the number has been completely set up by Speccation ofLetters Patent.

Patented Juiy 4t, 19u16.

Divided and this application filed May depressing a pin upon( each ofseveral digit bars, the latter may be driven forward by a generaloperator, which in this typeof niachine usually includes a cross bar,which, in advancing, strikes the depressed ends of the index pins,thereby driving all the bars, together with their dial wheels, each toan extent dependent upon the value of the set pin thereon. These barsusually have racks upon their forward ends, which racks are usually inengagement with dial-rotating pinions. In said divisional Patent No.1,176,364, these digit bars, one of which is provided for eachdenomination, are individually shifted to pin-setting'positions by meansof a selector dog mounted upon the carriage'of the typewriter. Said dog,during the letter-feeding movements of the carriage, displaces one afteranother a series of jacks which are connected to said digit bars; thusdisplacing the bars one by one. Thus the index pinsl upon the digit barsare successively brought within range of mechanism actuated by theprinting keys of the typewriter. Each key in said patent is connected toa linkage which is capable of set` ting an index pin in anydenomination. Each of the setting linkages is operated every time thatits numeral key is depressed,-

of a plurality of registers, so that at they printing of only onenumeral upon the work sheet, the indexing devices are set for apluralityl of registers; and when the entire number is once written uponthe work-sheet, said number may be carried into a plurality ofregisters, each having a gang or system of dial .wheels In the drawingsis illus trated a. machine in which a number once written may be carriedinto three registers simultaneously, but one 'of these registers may beomitted, if desired.

' which are on the carriage, and the index- In the present application,one feature resides in the provision of the typewriter carriage withdogs or devices for determining what denomination of index pins shall bebrought under the control of the numeral keys'of the'typewriter,suitable connections beingprovided between the selecting means pindevices which are controlled by the keys. Each key is capable of settingpins in all thel denominations, while the carriage determines whatdenomination, at any particular time, shall be brought under the controlof the keys. In order to do this, the dogs mounted on the carriage areadapted .to 'engage each a series of ldenomination jacks or levers whichare connected to a series of denominational bars, each of which carriesa series of index pins. The dogs are preferably adjustable at differentpositions along the carriage, so as to permit the written columns to beplaced at different portions of the work-sheet.

There are preferably nine index pins on each bar, and there may be ninebars, thus making eighty-one pins. Each of said jacks lifts its.connected bar to bring the pins thereof into position to be struck byany of aseries of pin-setting devices, these being connectedrespectively to the different numeral keys of the typewriter.

The letter-feeding movement of the carriage is toward the left,- and thefirst denomination jack whichis acted upon by the carriage dog or dogs`is the highest one. ofthe series. Nevertheless, the highest wheel isplaced at the left of the series of wheels,

land consequently the highest index-pin bar means for causing anydesired two or more.

of said `registers to compute the same individual items simultaneously.

The carriage of the typewriting machine has a relatively `long range oftravel, so as to permit the writing of a column of figures at variouspositions regarded widthwise of the sheet; that is, a column may bewritten near the left-hand edge of the sheet, or near the right-handedge, or at any one of sundry intermediate positions; and according toone feature of the present mvention, a co-l- 'vidual for its column; andby reason umn which is to be computed simultaneously upon two or moreregisters may be written in any one of a variety of such 1 positions, orin other words, the carriage can lmove into and out of the computm Zone,and such zone may be variably locate vand wherever located, any numberwhich is written in such Zone may be subsequently carried into two ormore of the registers,

although such registers may remain in stationary positions upon the'typewriting mac-hine. To this end the selector dogs upon the carriageare made individually adjustable, so. that they may all be placed inpositions corresponding'with one another, so as to come in harmony withtheir respective sets of jacks at the time of writing the number in the'desired locationi upon thework-sheet.

Moreover, when t-he carriage Ais outside of the adding zone, the keysmay be freely operated without liability Iof affecting the computingmechanism, because of a provision for rendering each selector doginoperative except upon its own set of denominational jacks; that is tosay, when the carriage is in the adding zone, each selector: dog mayoperate upon its own set of jacks, but when the carriage is out of saidzone, each selector dog may pass idly by the jacks in the other sets.structed to .be incapable of operating any except its own jacks. f,

Furthermore, the machine is capable of a wide range of use, being soconstructed that either two or three columns maybe written side by sideuponI thev work-sheet,

and the numbers in each column added upon.

each register being indi-` of the provision for adjustment between theselector separate registers,

1n fact, each dog is Qn-` dogs and the sets of denomination jacks,

the columns may be placed4 more closely upon the work-sheet than thesets of denomination jacks are placed upon the machine;

and other .adjustments are permitted in the relative locations of theprinted columns.

One of the features of this application relates to the control by theshift key and by the tabulator key of the connections between the dogsand the jacks.

In the Underwood typewriting machine, to which the improvements aredescribed as being applied, a shift key is employed for causing thetypewriter to print either capital letters or small letters at will.This shift key is connected to the aforesaid carriage dogs orldenomination selectors to disable the latter, sothatcertain vcharacterscan be written upon the work-sheet affecting the adding mechanism (saidcharacters eing those which are formed upon the same typebars with thenumeral types and printed by the same keys). There is'also psuallypirovided on the Underwood typewriter, a key for releasing the carriagevfrom the control of its letter-feeding mechanism, and there ispreferably provided (according to the present application) meansconnecting such release key to the device that disables saiddenomination-selecting dog or dogs, so that when the carriage is beingrun rapidly, said dog or dogs will not engage any of the denominationjacks. Such release device is operable by the tabulator key or keys ofthe Underwood machine, and hence it follows that when the tabulatingmechanism is being operated, the adding mechanism is put temporarily outof use, until the carriage has made its run and comes to rest at thedesired position.

The capital shift key i referred to is connected to means for disablingsuch punctuationlocking device, so that other characters than numeralsmay be written in the punctuation spaces if desired. There are alsoprovided improvements in mechanism for re-setting the dial wheels tozero.

Another feature resides in providing improved means for restoring tonormal position the index-pins after they have been utilized fordetermining the extent of rotation of their respective dial wheels.There is also preferably provided an indicator plate having means fordiiferently grouping the decimal order of the dial wheels, to avoidconfusion to the operator.

One of the features consists of a mechanism for facilitating the.correction oferrors, comprising ya lever, a lock normally holding saidlever against movement, and a key-set spring which moves the lever, thespring being set by the key and then causing the lock to release thelever. Preferably means-are provided for re-setting to zero any one ofsaid lregisters independently of the others., There are preferablyprovided means vfor bringing said registers one at a time under controlof the keys, Ainea-ns for simultaneously bringing any desired two ofsaid registers under control of the keys, means for accumulating numberson said registers, and means for clearing one register-at a time. Asmany of said registers as desired may be simultaneously cleared orre-setzto zero.

There may be simultaneously set up index-pins representing numbers ofequal digit and decimal values for different registers, and thesenumbers may be simultaneously carried. into different registers. ln thatcase, one register mayv be operated to be returned to Zero conditionindependently of the remaining register or registers, and asto thisfeature the invention is not limited to the return of the registerr tozero condition by the means shown.

There may be asystem of i dex pins for each' register, and means prferably provided to act upon these pins for simultaputing machine.

neously setting up numbers on different groups of pins. i

Other features and advantages will hereinafter appear. v

My improved typewriting and computing machine is illustrated in theaccompanying drawings, wherein like characters refer to like partsthroughout the several views.

1n the drawings: Figure 1 is a plan view showing the completetypewriting and com- Fig. 2 is a rear elevation of the completetypewriting and computing machine with some parts broken away. Fig. 3 isa side elevation showing the complete typewriting and computing machinesome parts being broken away, and some parts being sectioned. Fig. 4 isa skeleton view partly in side elevation, and partlyin vertical section,and with some parts broken away, showing theshift key mechanism of thetypewriter, and illustrating the relation thereof to parts of thesocalled decimal order selecting mechanism. Figs. 5, 6 and 7 are detailsin rear elevation, showing parts of the decimal order selectingmechanism and of the punctuation-space key-locking mechanism, andillustrating the different adjustments of the latter. Fig. 8 is ahorizontal section through the computer case, on the line lrS--s of Fig.3, the typewriter and certain other parts being removed from workingposition. Fig. 9 is a vertical section taken approximately on the lineain-.r9 of Fig. 8, with the typewriter removed, and with some parts ofthe-computing mechanism broken away. Fig. '10 is a vertical sectiontaken approximately 'on the line wlo-azlo of Fig. 8, with the typewriterand certain other parts removed. Fig. 11 is a detail in vertical sectiontaken on the line U11-m11 of Fig. 1. Fig. 12 is a section taken on thelinealz-.r12 of Fig. 11. Fig. 13 is a detail with parts broken away,showing a guide for the upper ends of the lever connecting rods of thedecimal order selecting mechanism, and ofthe punctuation-spacekey-locking mechanism. Fig. let is a vertical section takenapproximately on .the line .cl-x1* of Fig. 8, with the typewriter and,certain other parts removed. Fig. 15 is a detail view in plan, withsome parts broken away and some partsremoved, showing the so-called unitbars and associated parts. Fig. 16 is a front elevation of the partsshown in Fig. 15, showing also, underlying register bars, unit pins, andcertain other parts, said unit bars being sectioned. Fig. 17 is 'adetail in transverse vertical sectiontaken on the line T- of Fig. 16.Fig. 18 is a transverse vertical section taken onthe irregular linem18-w18 of Fig. 16. Fig. 19 is a detail view partly in si? .ing a clutchdevice which constitutes part elevation and partly in section, showand aportion of the unit bar frame.

` section taken on the line m40- m40 of the Zero mechanism, forresetting the register wheels at zero. Fig. 20 is a plan view showingthe so-called zerovbar, part thereof Ibeing' broken away. Fig. 21 is aside elevation of said Zero bar and shows also several oftheunit barsand a coperating portion of the unit bar frame, in section. Fig. 22 is aplan View showing one of the register bars, and its unit pins. Fig. 23is aside elevation of the said register bar, and shows also in section,several of the overlying unit liars 1 24 is an enlarged detail, partlyin plan angd partly in horizontal section, illustrating the manner inwhich the -unit pins are mounted on the register bars. Fig. 25.is asection taken approximately on the line w25-10025 of Fig. 24. Fig.`26`lis a detail in vertical section taken approximately on the lineIwah-m26 of Fig. 8, some parts being broken away. Fig. 27 is a plan viewof parts shown in Fig. 26, some parts being broken away, and some partsbeing removed. Fig. 28 is a detail showing in side elevation, one of thelower selecting levers of the decimal order selecting mechanism, aplurality of which are shown in Figs. 26 and 27, and elsewhere. Fig. 29is a transverse 'vertical section' viewed from the rear, takenapproximately on the line w29-w29 of Fig. 27, some parts being removed.Fig. 30 is* a plan view of the so-called transposing bars shown in Figs.26 and 27 all other parts being removed. Fig. 31 is a detail view takenin section on the vline xsl-w31 ofFi 8, showing the zero key and zerobar an coperating connections. Fig. 32 is a transverse section taken onthe line w32-m32 of Fig. 31. Fig. 33 isa detail view in side elevation,showing a portion of one of the numeral keys, and particularlyillustrating the means for adjustably connecting the ,so-called pushbars to the respective'numeral keys, and depending stenis to saidpushbars. Fig. 34 is a section taken on the line m34- m34 of Fig. 33.Fig. 35 is a section taken approximately on the line @n35- m35 ofFig. 1. Fig. 36 is a detail view chiefly in rear .elevation with someparts sectioned, showing a full stroke device for the operating leverand operating carriage. Fig. 37 is a section taken on the line m37- m37of Fig. 36. Fig. 38 is a detail view showing, in plan, portions of theunit pin restoring device, of the unit bars, the register bars, unitpins, the zero bar, the register bar intercepting stop, and. certain`other parts. Fig. 39is a detail in section on the line @USL-1139 of Fig.38. Fig. 4G Iis a of Fig. 37, some parts being broken away. Fig. 41 is adetail of the side elevation, showing the reversing lever of thesaidfull stroke device,

some parts being broken away.

In the detailed description, the following classification of mechanismand of reference .the shifting keys,

merals. Regis er proper, designated by' u' and its power The unit bars,their connections to numeral keys of typewriter, and associated parts,designated by band its powers. Decimal order register bars, unit pins orpreliminary representationdevioes, operating carriage and associatedparts, including variable throw and full stroke devices, designated by cand its powers. Decimal order selecting mechanism, designated by f andits powers. Punctuationspace key-locking mechanism, designated by g andits powers. Zero device, designated by k and its powers. Errorcorrecting devices, designated by? and its powers. Additional safetydevicesf including carriage operated numeral-key lock; register barsafety lock," operated by error correcting key and by operatingcarriage; and carriage operated transposingbar depressing device,indicated by t and its powers.

Typewriter and computer casa- The typewriter illustrated is a No. 5Underwood, the construction and operation of which is well solunderstood. Hence, for the purposes of this typewriter frame, thenumeral 2 the type' writer carriage, the numeral 3 the type bars, thenumeral d the character keys, the numeral 5 the numeral keys, thevnumeral 6 andthe numeral 7 the spacing bail or space bar. All of thesekeys, are', of course, spring held in their uppermost or normalpositions.

The typewriter carriage 2, see particularly Fig. 4, has a. verticallymovable supplemental frame 2, that is held for parallel movements byarms shaft 9, mounted in suitable bearings on the carriage 2, and it hasthe customary wheel 10 that runs upon a guide rod 11, connected forparallel movements by a pair of' bell crank levers 12 secured to a rockshaft 13, which in turn, is journaled in suitable bearings on thesidesof-the typewriter frame 1, all as best shown in Figs. 3 and 4. Theplatenor paper-supportin roller 14 is, of course, carried by thesupplemental frame 2".

The supwardly extended rear ends of the shift keys 6 engage the backs ofthe bell crank levers 12, so that when either one of the 'shift keys isdepressed, lrod 11 will be raised,"thereby lifting up the supplementalfra-me 2a with its roller or platen 1 4, so as to lthereby present theprinting surface of the paper on the roller,l tothe upper-case lettersofthe type bars.

8 connected to a rock ln the normal position of the parts, best shown inFig. 4, a lock pin 15 on the lower end of one ofthe bell crank levers12, engages the rear extremity of a cam slot 16 formed in the rear endof a downwardly springpressed shift lock lever 17, intermediatelypivoted on a fixed rod 18 and subject, at its forward end, to a camacting rocker 19, the upper end of which, in turn, is subject to theaction ot a. cam pin or projection 20 on one of the shift keys 6. Bythis means, the sup plemental section 2aof the typewriter carriage,while always free for common traveling movements with the mainsection 2of the said typewriter carriage, is nevertheless normally locked againstrising movement by the engagement of the said pin 15 with the upwardlyextended rear extremity of the said slot 16. This locking feature has animportant relation to the decimal-orderselecting mechanism, hereinafterdescribed.

The numeral 21 indicates a spring-held vline-feed lever which isconnected to the platen or roller 14 11i the customary way,

through a pawl and 'ratchet device, so that when the said lever is movedtoward the right, the roller and paper will be moved one step, asrequired for the line feed. rlhe typewriter carriage is under springtension from a suitable motor spring, not shown, and moves from righttoward the left, with astep-by-step motion, under the control of asuitable escapement that is subject to the key action. 0f the parts ofthis escapement, only the rack 22 is shown in Fig. 2.

On the front of the upper portion of the typewriter frame 1 is a longtransverselyyextended scale 23, with which a pointer 21 on thetypewriter carriage 2 cooperates, to indicate transverse location on thepaper, where characters will be printed, in any position of thetypewriter carriage.

The numeral 25 indicates stops adjustably secured on a transverse rod(not shown), which, in turn, is rigidly secured to the Atypewriter frame1 lat the upper front 'portion thereof, to-wit, immediately below thescale 23. These stops 25 serve to variably limit the extreme travel ofthe typewriter carriage. f

The numeral 26 indicates upwardly springpressed tabulating keys (seeFigs. 1 and 3) which operate in the usual way to release the typewritercarriage, for tabulating purposes; and the numerals 35, 36 and 37 (seeFig. 2) indicate respectively, ,thev adjustable tabulating stops, thenotched stopsupporting bar, and the cooperating scale of the tabulatingmechanism. The usual key-actuated interceptiig bars (not shown) cope atewithl the tabulating stops 35, to intercept the movements of thetypewriter carriage, in the tabulating action.

All parts ot' the typewriter so far described, are foundin the No. 5Underwood equipped with tabulating mechanism, which, as above stated, isthe typewriting machine illustrated in the drawings.

For the purpose of this case, it is only necessary to state that thedepression of any tabulating key will depress also one of the shift keys6 (as shown, the right-hand shift key), while the depression of the saidshift key will not depress any of the said tabulating keys; and thatthis is accomplished by means of an upwardly spring-pressed bail 27,pivotally connected to thetypewriter frame 1, with its transverse freeportion underlying all of the said tabulating keys 2G; and by a link 28,pivotally connected to an extension 62L of the said right-hand shift keyC, and having a slot that is engaged by the head of the stud 29 on oneside of the said bail 27, as best shown in Fig. 3.

The Underwood'typewriter No.5 is provided with an automaticspeed-governing mechanism, for controllingthe speed of the typewritercarriage when the latter is ref leased from its step-by-step controllingescapement. Of the parts of this speed-governor, in so tar as they areshown in Fig. 2, the numeral 31 indicates a bevel gear rigidly attachedto the spring barrel that encases the main spring (not shown) whichpropels the carriage in its operative movement. The numeral 33 indicatesa pinion meshing with the bevel gear 31 and secured on a short shaft,having its bearings in the cylindrical casing 34 that contains thespeed-regulating mechanism proper. This cylindrical casing is pivotallymounted on the typewriterJ frame, and normally it is swung away from thebevel gear S1 so that the pinion 33 is out of mesh with said bevel gearduring the ordinary movements of the typewriter carriage.

lThe tabulating keys 2G, through connections (not shown), operate whenany one .thereof is depressed, to move the casing 34 on its pivot, andthereby cause the pinion 33 to mesh with the gear 31; and in this way,the speed-governing mechanism is thrown into action whenever atabulating key is depressed, and the typewriter carriage is disconnected from its steplby-step escapement mechanism. y

rl`he computer case upon which the typewriter frame is detachablymounted, a-nd within or upon which most ot the parts ot the computingmechanism are directly or indirectly mounted, is indicated by the numeral 30, and, as shown, it is of rectangular box-like form, and isprovided with various bearings and sha-tts and other parts which will beparticularly noted in connection with other groups of mechanism.

The register-For the purpose of independently listing and adding numbersin several columns, on a sheet of paper, the machine herein illustratedis provided with several registers having correspondingindependently-operating decimal-order-selecting mechanism, andcorresponding preliminary representation devices, including registerbars, and unit pins mounted thereon.

My invention is not in the field of register construction per se. Eachregister may comprise a group of decimal-order digitbearing wheels a,Fig. 9, all as shown, mounted on a cross shaft a1,supported by `bearingbrackets rising from the bottom of appearing in the drawings, to-wit,the sixtoothed wheel ai and the three-toothed wheel aw. On another crossshaft al* are mounted a series of gear segments orftoothed arms a, whichcoperate with theparts on the shaft as, in the tens-carrying action.

The tens-carrying shaft a14 has apinion al connected therewith by'aone-way clutch device, not shown, but which may be identical with thatshown in Fig. 19; and this pinion al meshes with an intermediate gear ajournaled on one side of the case 30, and meshing withthe left-hand rackbar c7 of the operating carriage hereinafter described, A

' shown as provided with a-slo'tted end that engages a stud orprojection b1? onthe corresponding ytie bar bf2-sce Fig. 16. Thesev asbest shown in Fig. 14.

The counting wheels a may be simultaneously operated or moved differentdistances by the coperating register bars, under thev forward action ofthe computer carriage, and thereby the tens-carrying devices will be soset that the tens will becarried forward, from one denomination -to theother, in the regular order of the decimal scale, or from right towardthe left, under the return movement of the computer oper ating carriage.

Um't bars, and .their connections to frmmeral keg/s oftypewriter-Directing attention particularly to Figs. 3, 8, 9, 15, and16,` it will be seen that the numerall keys 5 Aare provided withdepending push bars that work through slots b1 in theforwardly-projecting flange of a transversely-extendedv elongatedrectangular frame b2, supported from the 'computer case 30. Preferably,the unit bar frame b2 is detachably mounted on the computer case 30, seeFigs. 10 and 16, and hence, the ends of the transverse bars of saidframe are notched at 2b for engagement with the depressed ends ofsupporting ,612. in the strips 2 rigidly secured on theV sides of thesaid case 30.

To Amake bars b adjustable and removable, they are pivoted on studs b ofcoupling brackets b3 that are intermediately pivoted on the numeral keys5, and arcadjustably locked thereto by opposing sety said rock shaftsare provided with arms be' (Fig. 32) that are adapted to be engaged bythe said corresponding push bars When the corresponding numeral keys 5are depressed.

Mounted for vertical movements in frame b2 are nine so-called unit barsbl that are parallel to eachother, and extendl at right angles to therock shafts b5, or,'in`l other words, that extend transversely of the1comy puter case 30 andof theunderlying regisv ter bars, presently .to bedescribed. As shown in Eig1V 16,-the ends ofv unit bars bl work ingrooves o8 cutin the. lower transverse end'bars of the-1 frame-.212, andare thereby held against lateral] movements. Each unit bar Z is coupledto a corresponding overlying tie bar b". bya pair of bell cranks b1,which are loosely mounted on transverse rods b 'secured vtothe sides ofthe frame b2.

Each rock shaft Z-vhas-aishort arm b,

arms 512, see Fig. 15,l arearranged on an oblique line, so that thenumeral keys from lower to higher orders, or lin a. direction from lefttoward the right, are coupled to, or operative on, the series {of-unitbars 1ocated successively from the-front toward the rear of themachina-this being done for an important purpose Awhich will ap"- pearwhen considering the arrangement ofthe unlt pins or prehmlnaryrepresentatlon devices on the register bars. As shown inFig. 16, 711.*indicates coiled springs, which yieldingly pull the unit bars b" upward,and normally hold thesame and the coperating bell cranksb1, tie bars 7)rock shafts o, and rock shaft arms b and I positions best shown in saidFig. 16.`

vWith the construction described, it is evident that the depression ofone of the numeral keys will result in the depression of thecorresponding unit bar b?. It will also be noted, particularly byreference to Fig.

